1017777-55-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1017777-55-7 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,0,1,7,7,7 and 7 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 1017777-55:
(9*1)+(8*0)+(7*1)+(6*7)+(5*7)+(4*7)+(3*7)+(2*5)+(1*5)=157
157 % 10 = 7
So 1017777-55-7 is a valid CAS Registry Number.